Index: /trunk/Ohana/src/opihi/dvo/region_list.c
===================================================================
--- /trunk/Ohana/src/opihi/dvo/region_list.c	(revision 5995)
+++ /trunk/Ohana/src/opihi/dvo/region_list.c	(revision 5996)
@@ -43,4 +43,6 @@
   if (sky != NULL) SkyTableFree (sky);
   sky = SkyTableLoadOptimal (catdir, skyfile, gscfile, skydepth, verbose);
+  if (sky == NULL) return FALSE;
+
   SkyTableSetFilenames (sky, catdir, "cpt");